Material working apparatus



Feb. 6, 1945. R SHERMAN 2,368,786

MATERIAL WORKING APPARATUS Filed Aug. 29, 1941 .32 -32 44 j INVENTO/P I9 R. J. SHERMAN ATTORNEY Patented Feb. 6, 1945 I MA'r-ERIAL WORKING APPARATUS 4 Russel J. Sherman, Rutherford, N. J assignor to f Western Electric Company, Incorporated, New York; NZ Y., a corporation of New "York "Application August 29, 1941;Serial No: 4083706 9 Claims. (c1."z755) This invention relates 'to-material working appar'atus, and more particularly to tool attachments for drill presses.

' Conventional tool" holders such as chucks of drill presses, lathesor the-like are usually-made fairly-large to incorporate durable tool gripping "mechanism therein, and for this reasonit has been found impossiblev to use such structures for workwithin small containers or the like.

Anobject ofithe invention isto-provide a material' workmg apparatus; particularly an attachment ior-"apower driven n'iachine, to condition the machine' to perform work in restricted areas on' materials.- i

with thisand otherobject's in view, the invention comprises'a materialworking-apparatus in combination with i a driving unit; the apparatus comprising an arm supporting 'a tool attachment at one'end and a" connection witha driven unit .at the-'otherend, theconnection and the attachment being operatively connected to each other so that the tool may be driven 'by the unit; an indicatorelement positioned with" a point thereof in alignment with the tool facilitating in' aligning the tool with a point of the material to be worked.

Other objects and advantages will be apparent gn'e au at l s and com osed of two anama-up ly a main or supporting part 'I 9 "and an adjust-f able end 20. The part IQ of the arm-has threaded apertures 2| to receive screws 22 passing through apertures 23 in the'table- I4 to rigidly secur the arm to the table. The parts 19- andill "of the" arm l8fare provided with aninterfitting variable connection as illustrated in Figs. 1, 2 and'4, the part l9 having a -slot theriain resulting 1 in a" relatively thin or fresilient wall portion 26 and a relatively thickwall portion 21. In these wall portions sets of aligned apertures are formed, the aperturesinthe portion 21 being threaded to receivethe threadedcnds'of screws 15 28. The part'lll of thearmhas ar'educed porticn '29 receivable in the 'slot'25; thisportion"; also having an elongate aperture therein" through which the screws pass to allowaligned" adjustment of the parts "of "-the arm, thescrews" rzs cooperating with the wall portions '2 fiand 21 to secure the parts 'of the am m any desired position.

from the following detailed description taken in conjunction with the accompanying drawing,

wherein Fig. 1 is aside elevational viewof the-apparatus'shown attached to a, drill press, portions I of the apparatus beingshown' in section;

Fig. 2 is-a top plan view of theapparatus, this view being taken substantially along the line 2-2 of-Fig. 1;

Fig.3 is a verticalsectionalwiew taken along the line 33 of Fig. 1, and

Fig. 4 is a verticalsection'alview taken along the line 44 of "Fig;'' 1.

Attention is now directed to the drawing, wherein numeral l0 designates pmaterial working machine of any suitable type,'-;that illustrated for the purpose of the invention being' a drill press. The machine l'lla "driving unitll,

which in' the'present instance is a tool sup-- porting chuck' driven by'-a spindle l2 rotatably supported" at I 3 iii-the conventional manner; The details of the chuckaremot set forthyas th'e' structure; operation and purpose thereof are well-known. The machine lllalso-has a table Mcar'ried by-asaddlei I5 or other suitable means adjustable vertically and 'held -in any desired positionby a-screw- I6.

The apparatus comprises --an--*a;rm' indicated .36 disposed therein. 30 "V has longitudinal grooves 32' at both sides thereof 1 parallel with each other and terminating at apertures 34am 35. The'aperture 34 extendsthefull width 'of the arrn communicating with 'both' longitudinal grooves 32, and has a sprocket wheel "A spindle '38 extends through the sprocket'wheel'35and is fixed there- 3 to 'byany suitabie means such as a key" and* keyway. Suitah-lebearin'gs 39=are formedin the arm upon bothsides ofthe s'li rc' cket whee1,"to

rotatablysupport the spindle 38. As will be" observed by viewing Fig.1, an aperture 40"in the table [4 permits the spindle38 to project downwardly therein. Thisaperture' lllds'to re ceive either endof the spindle; as the apparatus is formed-so that it may be 'use'd either'in the *position show-mor in a"reverse position, as will' hereinafter be described. .A- flexible-coupling 4 I of the conventional type is disposed upon the spindle--38 and serves to operatively connect the f spindle ewith thediiViIig' unit o'r c huck ll. -1n' other-words, the newbie-coupling may -have =two metallic portions joined b y a resilient portion, onemetallic 'pdrtion being connected to thespiridle while the other metallic: portion has a spiridleor pin-like 'connection serving ionconnec A chain 44 operatively connectsthe sprocket wheel-36'-'witha sprocket wheel 45; the chain passingthrough the groo'ves: 32 in thesides of the-' arm. l8. The chain-* l lis composed ar a plurality of 'connecteddinkswhich may be vane-a in number to compensate for variations in the length of the arm 18. The sprocket wheel 45 is disposed in the recess or aperture 35 in the end of the arm l8 and mounted upon a shaft 41. The shaft 41 is journalled in suitable bearings 48 in the arm l8 and has one end provided with a central aperture 49 for a portion of its length to receive a shank 50 of a tool The tool Si is one of various types which may be employed, this being a burringor countersinking tool. The outer end of the shaft 41 is enlarged,

' as at 52, to accommodate a set screw 53 serv ing to rigidly secure the tool in the shaft.

Attention is directed to the fact that the tool 5|, together with its supporting and driving means is mounted adjacent the end of the arm l8 and that this structure, including the tool and the supporting end of the arm, is small in comparison to" the conventional chuck II. It is, therefore, possible for the tool to perform operations in restricted areas such as within small containers 54 even where the tool may be hidden from view of the apparatus.

To assist the operator in positioning the material accurately with respect t the tool, an in dicating element 55 has a point 56 which may be disposed in alignment with theaxis of the tool to identify the location of the tool when the tool is hidden from the view of the operator. The element 55 ,is of the general contour illustrated in Fig. 1, provided with a reduced shankportion 51 receivable in an aperture 58 of a support 59, a set screw 60 serving to lock the element in a desired position Within the'support. The support 59 extends rearwardly from the end of the arm l8 supporting the tool, so that material of various widths or lengthsmay'he disposed relative to the tool without interference from the support. The rearward end of the support 59 is bent at right angles, as at El, this portion being threaded and extending through an aperture 62 of the, portion I9 of the arm, nuts and washers 63 being provided upon opposite sides of the arm to secure the support 59- in any desired position relative to the arm.

The operation of the apparatus is as follows:

With the apparatus operatively connected to the 1 driving unit I I,as shown in Fig. l, rotation of the driving unit will cause rotation of the spindle 38, through the flexible coupling 4| to drive the l sprocket wheel 3B,'the latter driving the sprocket wheel 45 through the chain 44. The sprocket wheel 45,through its shaft 41, will drive the tool 5| in the same direction that the driving unit I I V is rotated. Let it be assumed that the metal container 54 has a plurality of holes therein, these 1 holes having .been drilled in the walls of the coni tainer, leaving burrs on their edges within the container which must be removed. If the con- 3 tainer has an open end it may be positioned over the end of the arm l8 so that a selected outer 1 surface thereof will ride beneath the element 55 until the point 56 has registered with one of the holes. This action, the registration of a hole with the point of the element, assures the operator that the hole is in direct alignment with the tool.

therein; will be accurately moved into engagement Therefore, by lowering the container, the hole with the driven tool, resulting in the removal of the burrs from the edge of the hole. This'operation may be repeated, the element 55 serving to l accurately align the successive holes in the, container with the tool, eliminating the necessity of guesswork on-the part of the operator and the obvious resulting damage to the material.

It is also possible for the tool to perform work Within tubular structures or other restricted areas, either through the assistance of the indicating element 55 when the tool is hidden from view or without the element when it. is possible for the operator to see the portion of the material which is desirable to be brought into engagement with the tool. Furthermore, the apparatus may be disposed in a reverse position from that illustrated, by removing first the screws v2'12, disconnecting then the unit II and the coupling I4, raising the unit in the conventional manner so that the apparatus may be reversed, and again forming connection of the unit and coupling with the spindle 38 after the arm has been mountedin place through the aid of the screws 221 This positions the tool 5| in a downwardly projecting position where, aided by the element 55 or without its assistance, depending upon the type of work to be performed, the tool may again be put in operation.

.The invention, therefore, comprises an apparatus which may be driven by suitable means, the present means selected for this purpose being a drill press wherein the driving force of the chuck is utilized to drive the tool. serves as a means to extend power from a unit incapable of performing various functions, to a strcuture of restricted size including a, material working tool capable of performing various operations within restricted areas which heretofore have not been capable of being performed by machine. Furthermore, when the restricted areas are such that they are hidden from the operators view, theelement 55 -functions to assure the operator of the accurate location of each portion of the Work where an operation is to be performed and to remove all danger of damage to the work resulting from the need of the operator guessing the relationship of the tool and the portions of the material where operations are to beperformed. V

The embodiment of the invention herein dis closedis merely illustrative and may be widely modified and departed from in many Ways without departing from the spirit and scope of the invention as pointed out in and limited solely by the appended claims. What is claimed is:

1. A material working apparatus in combinacating pointer mounted to point to the tool to indicate the location of the tool relative to ma- 7 terial. y

2. Amaterial working apparatus in combination with a driving chuck, the apparatuscomprising a tool, means to support the tool at a position spaced fromthe chuck, means'.operatively connecting the tool to the chuck, and 'a 5 pointer positioned to point to the tool to indicate the location of the tool relative to materialto be worked on by the tool.-

positioned. to point to the tool to indicatethe Th apparatus 3. A material working apparatus in combina tion with a driving chuck, the apparatus comprising a tool, means to support the tool at-a position spaced from the chuck, means operatively connecting the tool to the chuck, and a pointer location of the center of the tool relative to material to be worked on by the tool.

4. A material working apparatus in combination with a driving unit, the apparatus comprising a tool, means to support the tool at a position spaced from the unit, means operatively connecting the tool to the unit, and a pointer positioned to point to the tool to indicate the location of the axis of the tool and the direction of the axis relative to material to be worked on by the tool.

5. A material working apparatus in combination with a driving unit, the apparatus comprising an arm having grooves therein, rotatable elements mounted at spaced positions in the arm, means to operatively connect one of the elements to the driving unit, a tool, means to operatively connect the tool to the other element, a chain housed in the said grooves and operatively connecting the elements to cause driving of the tool upon operation of the driving unit, and an element indicating the location of the tool relative to material to be worked on by the tool.

.6. A material working apparatus in combination with a driving-unit, the apparatus comprising a tool, means to support the tool at variable distances from the unit, means operatively connecting the tool to the unit, and. a pointer variable in location with variations in the positioning of the tool to point to the tool to indicate the location of the tool relative to material to be worked by the tool. l

'7. A material working apparatus in combination with a drill press having a driving chuck and a table, an arm, means to secure the arm positions in the arm, means to operatively connect one of the elements to the chuck, a tool, means to operatively connect the tool to the other element, and a flexible member operatively. connecting the elements to cause driving of the tool upon operation of the driving unit, the said securing means for the arm and the connecting means for the chuck and its respective rotary element being adapted for reversal of the position of the arm and the tool.

8. A material working apparatus comprising an elongate arm, means to support the arm, a driving means adjacent one end of the arm, a driven means adjacent the other end of the arm, means,

to operatively connect the driving and driven means, a material working tool secured to the driven means and driven about its axis thereby,

and a member positioned to point to the axis of the tool to indicate the location thereof when the tool is hidden from view by material to be worked.

9. A material working apparatus comprising an elongate arm, means to support the arm, a drivingmeans adjacent one end of the arm, a driven means adjacent the other end of the arm, means tool is hidden from view by material to be worked,

means by the aid of which the arm'may be varied in length, and means to support the said pointing member for variation in position with the tool during variation in the length of the arm.

RUSSEL J. SHERMAN. 

